. >> romney paid 14% in taxes last year on 13 million in income. >> obama wages war on coal. >> they blow everything out of proportion. >> reporter: in colorado alone, $47 million in five months have been spent by the romney and obama campaigns. and the groups that support them. come november people here can tell the rest of the nation how they feel about enduring all those tv ads. >> let me get your e-mail address. >> reporter: amendment 65 is on the ballot. if passed the state's congressional delegation would be required to propose an amendment to the u.s. constitution limiting campaign contributions and spending. this is the executive director of colorado common cause. >> the result is a democracy that distorts the voice of ordinary people in favor of those who can write multimillion dollar expects. >> reporter: billionaires would argue they have the same rights as to freedom speech as anybody else. >> freedom of speech problem texts to say what we want but it doesn't give them the right to shout louder than the rest of us. >> reporter: the 2010 ruling said restrictions on contrib